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34 | # include <typedefs.h> |
34 | # include <typedefs.h> |
35 | # include <arch/context.h> |
35 | # include <arch/context.h> |
36 | #endif |
36 | #endif |
37 | 37 | ||
38 | #define IDT_ITEMS 64 |
38 | #define IDT_ITEMS 64 |
39 | #define GDT_ITEMS 7 |
39 | #define GDT_ITEMS 8 |
40 | 40 | ||
41 | #define NULL_DES 0 |
41 | #define NULL_DES 0 |
42 | #define KTEXT_DES 1 |
42 | #define KTEXT_DES 1 |
43 | #define KDATA_DES 2 |
43 | #define KDATA_DES 2 |
44 | #define UTEXT_DES 3 |
44 | #define UTEXT_DES 3 |
45 | #define UDATA_DES 4 |
45 | #define UDATA_DES 4 |
46 | #define KTEXT32_DES 5 |
46 | #define KTEXT32_DES 5 |
47 | #define TSS_DES 6 |
47 | #define TSS_DES 6 |
48 | 48 | ||
49 | #define selector(des) ((des)<<3) |
49 | #define gdtselector(des) ((des)<<3) |
- | 50 | #define idtselector(des) ((des)<<4) |
|
50 | 51 | ||
51 | #define PL_KERNEL 0 |
52 | #define PL_KERNEL 0 |
52 | #define PL_USER 3 |
53 | #define PL_USER 3 |
53 | 54 | ||
54 | #define AR_PRESENT (1<<7) |
55 | #define AR_PRESENT (1<<7) |
55 | #define AR_DATA (2<<3) |
56 | #define AR_DATA (2<<3) |
56 | #define AR_CODE (3<<3) |
57 | #define AR_CODE (3<<3) |
57 | #define AR_WRITABLE (1<<1) |
58 | #define AR_WRITABLE (1<<1) |
58 | #define AR_READABLE (1<<1) |
59 | #define AR_READABLE (1<<1) |
59 | #define AR_INTERRUPT (0xe) |
- | |
60 | #define AR_TSS (0x9) |
60 | #define AR_TSS (0x9) |
- | 61 | #define AR_INTERRUPT (0xe) |
|
- | 62 | #define AR_TRAP (0xf) |
|
61 | 63 | ||
62 | #define DPL_KERNEL (PL_KERNEL<<5) |
64 | #define DPL_KERNEL (PL_KERNEL<<5) |
63 | #define DPL_USER (PL_USER<<5) |
65 | #define DPL_USER (PL_USER<<5) |
64 | 66 | ||
65 | #define IO_MAP_BASE (104) |
67 | #define IO_MAP_BASE (104) |
66 | 68 | ||
67 | #ifndef __ASM__ |
69 | #ifndef __ASM__ |
68 | 70 | ||
69 | struct ptr_16_32 { |
- | |
70 | __u16 limit; |
- | |
71 | __u32 base; |
- | |
72 | } __attribute__ ((packed)); |
- | |
73 | - | ||
74 | struct descriptor { |
71 | struct descriptor { |
75 | unsigned limit_0_15: 16; |
72 | unsigned limit_0_15: 16; |
76 | unsigned base_0_15: 16; |
73 | unsigned base_0_15: 16; |
77 | unsigned base_16_23: 8; |
74 | unsigned base_16_23: 8; |
78 | unsigned access: 8; |
75 | unsigned access: 8; |
Line 82... | Line 79... | ||
82 | unsigned special: 1; |
79 | unsigned special: 1; |
83 | unsigned granularity : 1; |
80 | unsigned granularity : 1; |
84 | unsigned base_24_31: 8; |
81 | unsigned base_24_31: 8; |
85 | } __attribute__ ((packed)); |
82 | } __attribute__ ((packed)); |
86 | 83 | ||
- | 84 | struct tss_descriptor { |
|
- | 85 | unsigned limit_0_15: 16; |
|
- | 86 | unsigned base_0_15: 16; |
|
- | 87 | unsigned base_16_23: 8; |
|
- | 88 | unsigned type: 4; |
|
- | 89 | unsigned reserve1 : 1; |
|
- | 90 | unsigned dpl : 2; |
|
- | 91 | unsigned present : 1; |
|
- | 92 | unsigned limit_16_19: 4; |
|
- | 93 | unsigned available: 1; |
|
- | 94 | unsigned reserve2: 2; |
|
- | 95 | unsigned granularity : 1; |
|
- | 96 | unsigned base_24_31: 8; |
|
- | 97 | unsigned base_32_63 : 32; |
|
- | 98 | unsigned reserve3 : 32; |
|
- | 99 | } __attribute__ ((packed)); |
|
- | 100 | ||
87 | struct idescriptor { |
101 | struct idescriptor { |
88 | unsigned offset_0_15: 16; |
102 | unsigned offset_0_15: 16; |
89 | unsigned selector: 16; |
103 | unsigned selector: 16; |
- | 104 | unsigned ist:3; |
|
90 | unsigned unused: 8; |
105 | unsigned unused: 5; |
91 | unsigned access: 8; |
106 | unsigned type: 5; |
- | 107 | unsigned dpl: 2; |
|
- | 108 | unsigned present : 1; |
|
92 | unsigned offset_16_31: 16; |
109 | unsigned offset_16_31: 16; |
- | 110 | unsigned offset_32_63: 16; |
|
- | 111 | unsigned reserved : 32; |
|
93 | } __attribute__ ((packed)); |
112 | } __attribute__ ((packed)); |
94 | 113 | ||
- | 114 | struct ptr_16_64 { |
|
- | 115 | __u16 limit; |
|
- | 116 | __u64 base; |
|
- | 117 | } __attribute__ ((packed)); |
|
95 | 118 | ||
96 | struct tss { |
119 | struct tss { |
97 | __u16 link; |
- | |
98 | unsigned : 16; |
- | |
99 | __u32 esp0; |
120 | __u32 reserve1; |
100 | __u16 ss0; |
121 | __u64 rsp0; |
101 | unsigned : 16; |
- | |
102 | __u32 esp1; |
122 | __u64 rsp1; |
103 | __u16 ss1; |
- | |
104 | unsigned : 16; |
- | |
105 | __u32 esp2; |
123 | __u64 rsp2; |
106 | __u16 ss2; |
124 | __u64 reserve2; |
107 | unsigned : 16; |
- | |
108 | __u32 cr3; |
- | |
109 | __u32 eip; |
- | |
110 | __u32 eflags; |
- | |
111 | __u32 eax; |
- | |
112 | __u32 ecx; |
- | |
113 | __u32 edx; |
- | |
114 | __u32 ebx; |
- | |
115 | __u32 esp; |
125 | __u64 ist1; |
116 | __u32 ebp; |
- | |
117 | __u32 esi; |
126 | __u64 ist2; |
118 | __u32 edi; |
- | |
119 | __u16 es; |
127 | __u64 ist3; |
120 | unsigned : 16; |
- | |
121 | __u16 cs; |
128 | __u64 ist4; |
122 | unsigned : 16; |
- | |
123 | __u16 ss; |
129 | __u64 ist5; |
124 | unsigned : 16; |
- | |
125 | __u16 ds; |
130 | __u64 ist6; |
126 | unsigned : 16; |
- | |
127 | __u16 fs; |
131 | __u64 ist7; |
128 | unsigned : 16; |
- | |
129 | __u16 gs; |
132 | __u64 reserve3; |
130 | unsigned : 16; |
- | |
131 | __u16 ldtr; |
133 | __u16 reserve4; |
132 | unsigned : 16; |
- | |
133 | unsigned : 16; |
- | |
134 | __u16 io_map_base; |
134 | __u16 iomap; |
135 | } __attribute__ ((packed)); |
135 | } __attribute__ ((packed)); |
136 | 136 | ||
137 | extern struct ptr_16_32 gdtr; |
- | |
138 | extern struct tss *tss_p; |
137 | extern struct tss *tss_p; |
139 | 138 | ||
140 | extern struct descriptor gdt[]; |
139 | extern struct descriptor gdt[]; |
141 | extern struct idescriptor idt[]; |
140 | extern struct idescriptor idt[]; |
142 | 141 | ||
- | 142 | extern struct ptr_16_64 gdtr; |
|
- | 143 | ||
143 | extern void pm_init(void); |
144 | extern void pm_init(void); |
144 | 145 | ||
145 | extern void gdt_setbase(struct descriptor *d, __address base); |
146 | extern void gdt_tss_setbase(struct descriptor *d, __address base); |
146 | extern void gdt_setlimit(struct descriptor *d, __u32 limit); |
147 | extern void gdt_tss_setlimit(struct descriptor *d, __u32 limit); |
147 | 148 | ||
148 | extern void idt_init(void); |
149 | extern void idt_init(void); |
149 | extern void idt_setoffset(struct idescriptor *d, __address offset); |
150 | extern void idt_setoffset(struct idescriptor *d, __address offset); |
150 | 151 | ||
151 | extern void tss_initialize(struct tss *t); |
152 | extern void tss_initialize(struct tss *t); |